XML File grouping


I have an XML Parser that uses a "XML Group Element" entry to split some large XML files into more manageable chunks.

If I open my XML file source string list I see the various groups created by the parser.

I would like to access the title of each XML group via a macro. 

I've spent quite some time examining the Automation help and I just cannot see how to get a handle on this information.

Can someone please put me out of my misery show me how to access this property?